// import parseTime, formatTime and set to filter
import dayjs from 'dayjs'

export { parseTime, formatTime } from '@/utils'

/**
 * Show plural label if time is plural number
 * @param {number} time
 * @param {string} label
 * @return {string}
 */
function pluralize(time, label){
  if(time === 1) {
    return time + label
  }
  return time + label + 's'
}

/**
 * @param {number} time
 */
export function timeAgo(time){
  const between = Date.now() / 1000 - Number(time)
  if(between < 3600) {
    return pluralize(~~(between / 60), ' minute')
  } else if(between < 86400) {
    return pluralize(~~(between / 3600), ' hour')
  } else {
    return pluralize(~~(between / 86400), ' day')
  }
}

/**
 * Number formatting
 * like 10000 => 10k
 * @param {number} num
 * @param {number} digits
 */
export function numberFormatter(num, digits){
  const si = [
    {value: 1e18, symbol: 'E'},
    {value: 1e15, symbol: 'P'},
    {value: 1e12, symbol: 'T'},
    {value: 1e9, symbol: 'G'},
    {value: 1e6, symbol: 'M'},
    {value: 1e3, symbol: 'k'}
  ]
  for(let i = 0; i < si.length; i++) {
    if(num >= si[i].value) {
      return (
        (num / si[i].value + 0.1)
        .toFixed(digits)
        .replace(/\.0+$|(\.[0-9]*[1-9])0+$/, '$1') + si[i].symbol
      )
    }
  }
  return num.toString()
}

/**
 * 10000 => "10,000"
 * @param {number} num
 */
export function toThousandFilter(num){
  return (+num || 0)
  .toString()
  .replace(/^-?\d+/g, m => m.replace(/(?=(?!\b)(\d{3})+$)/g, ','))
}

/**
 * Upper case first char
 * @param {String} string
 */
export function uppercaseFirst(string){
  return string.charAt(0).toUpperCase() + string.slice(1)
}

export function placeholderText(text){
  const placeholder = '-'
  return text || placeholder
}

// 时间格式处理
export function dateFormat(value, pattern = 'YYYY-MM-DD HH:mm:ss'){
  return dayjs(value).format(pattern)
}
